(57) Disclosed is a tail yarn cutting device for a spinning machine in which a tail yarn
cutting member is provided on a blade so as to be capable of ascending and descending,
with the tail yarn cutting member being constantly urged toward a spindle base by
a coil spring. The tail yarn cutting member and the spindle base portion are equipped
with a plurality of protrusions and recesses capable of being engaged with each other.
In a state in which a roll or less or yarn is wound at a position somewhat below the
portion where the tail yarn cutting member and the spindle base portion are in contact
with each other, cop is pulled up by a doffing device, and the tail yarn cuttingmember
is raised together with the cop halfway through the pulling-up, the yarn connected
from the cop to a traveler being guided to a position between the tail yarn cutting
member and the spindle base portion. Thereafter, the yarn is grasped between the tail
yarn cutting member detached from the cop and the spindle base portion 5b, and the
yarn is cut by a cutter portion.
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